I have a 150 watt heater in my 55 gal tank that is for a 45 gal tank and doesn't keep it at a constant temp. I went out and got a 200 watt heater. I'm leaving the house in half an hour and won't be home til later tonight, is it okay to leave them both plugged in set at 80? Idk how long the new one will take to warm up.